DD140713A5 - nozzle - Google Patents

Description

SPRITZDUBSB Field of application of the invention;

The invention relates to a spray nozzle for dispensing a liquid under pressure in the form of a spray cloud _t comprising

(A) a housing having a central nozzle outlet, and (B) a hollow nozzle interior serving to flow liquid through the nozzle outlet and surrounded by a side wall

(a) an outlet chamber located in front of the nozzle outlet and arranged coaxially with it along a median plane transverse to the nozzle center axis,

(b) a ring chamber arranged coaxially with the mouth chamber,

(c) at least two supply channels or passages _s v / obei the feed channels and the Kingkararasr connecting at least two the inlet chamber and the Kingkararasr connecting at least approximately tangentially to the periphery of the mouth chamber leading to this, each extending in a plane cutting the nozzle center axis, and

(d) at least one feed line for supplying liquid to the first turbulence stage,

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A spray nozzle of the type described above is from the U »S. PS 3.652 _e Oi8 known and serves for the mechanical "break-up" of a liquid flow to form a spray cloud of. Droplet. This known nozzle is easier to produce than. one with similar. Basic features designed in US ~ PS 3 * 083,917 described. The feed channels of the nozzle according to the US-PS 3.652.018 are separated by separating bodies such as steering or baffles from each other; they start from a common external ringkaramer and end in a common central outlet,

The arrangement of four feed channels which, starting from an outer annular chamber, terminate tangentially in the wall of a central cylindrical mixing chamber to produce an improved atomization of liquid material; is also already known from the US-PS I.594 ".641"

Third

However, these known spray nozzles do not adequately meet the requirements placed on many products to be sprayed, such as hair lacquer, deodorants, air fresheners or insecticides. So they should, in particular, e.g. For hair lacquer, have a particle size between 5 and 10a, in order to achieve a fast evaporation time, so that strands of hair is avoided when the consumer after spraying the hairstyle presses. Air fresheners and insecticides must quickly evaporate or float in the air * so they do not stain furniture, walls, carpets or parquet floors. Furthermore, the sprayed product despite the finest particle size must have a sufficiently strong impact force when it comes to hair lacquer so that it not only comes to rest on the hair, but can also penetrate between them, which ensures a breezy hairstyle. For air fresheners and insecticides, the spray cloud should penetrate the airspace as far as possible.

Commercially available spray nozzles as they stand for aerosol cans or pump sprayer available _s need to produce Sprühwolksn aforementioned quality a pressure of rain dens least 6 a tu, when used without liquid component about 3 atmospheres in the presence of such a component, because yes .a consisting of liquid propellant relaxes in contact with the ambient air and thus plays a decisive role in the formation of the fine droplet size in the spray cloud «

Aim of the invention;

The invention proposes a spray nozzle which can be produced simply and cheaply, with which a high spray quality is achieved at relatively low pressures.

In the presence of blowing agents in .zu to be sprayed medium and correspondingly high pressures, a previously unknown, significantly increased fineness of the particle size in the spray cloud achieved with the spray nozzle according to the invention »

Explanation of the essence of the invention:

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The invention has for its object to develop by changing its structural design, a spray nozzle which operates reliably at pressures of at most 2.4 atm and both for a liquid-gas-free atomization without air pump as well as for Zer-atomization of pressurized media can be used.

According to the invention, the object is achieved in that the hollow nozzle interior comprises at least one additional turbulence stage, and between a preceding in Strönmngsrichtung and the directly following turbulence stage in the Sietenwandung the hollow Duseninneren least one for breaking up the liquid flowing from the preceding to the subsequent turbulence stage Obstacle is provided, which deflects the flowing liquid out of a through the annular chamber perpendicular to the nozzle central axis extending flow plane out to the side of the nozzle outlet at an angle of up to 90 zn . The break-up obstacle may comprise at least one deflecting or impact surface opposite the flow direction.

Preferably, an additional turbulence stage between the feed line and the annular chamber of the first turbulence stage is interposed, wherein the feed line comprises at least two substantially extending in the axial direction to the nozzle axis axial feed channels and wherein the additional turbulence stage comprises at least two in the flow direction of the nozzle center axis approaching supply channels, of which one each with its inlet opening connected to one of the feed channels and opens with its outlet opening in the aforementioned annular chamber.

The obstruction may be a deflecting edge projecting into the liquid flowing through the supply channels in the outer or inner wall region covering the loading chamber on the side surrounding the nozzle outlet

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the side wall of the nozzle interior include. In this case, the impact surface may be formed on a shoulder in the side wall of the nozzle interior, wherein the shoulder is preferably mounted in that area, the side sanding of the nozzle interior> with respect to the nozzle outlet on the opposite side of the nozzle interior. The flow cross-section of the feed channel before the shoulder is "preferably greater than that of the same feed channel after the paragraph" Also, the impact surface may be provided at the confluence of a feed channel of the previous in the annular chamber of their directly subsequent turbulence stage,

In preferred embodiments of the spray nozzle protrudes from the nozzle wall opposite the bottom wall of the nozzle interior, a peg-like projection at least close to the inlet side of the nozzle 'outlet, wherein between the front end of this projection and the inlet edge of the nozzle outlet at least one passage gap from the mouth chamber to the nozzle outlet remains free. The foot zone of the projection is preferably cylindrical and coaxial with the nozzle axis, and the distance of its end face formed from the side of the nozzle interior containing the inlet side of the nozzle outlet should preferably be at most 0.1 ram. On the other hand, the projection may be tapered towards the nozzle outlet the distance of its front end from the inlet edge of the nozzle outlet should preferably be at most .05.05 mm.

In another embodiment of the spray nozzle, the projection whose foot zone is surrounded by the ring chamber of the first turbulence stage is located with its front end at the inlet of the nozzle outlet, and between the front end of the projection and the side wall of the nozzle inlet side containing the nozzle outlet Nozzle interior is provided with at least two secondary passages for liquid, each in a plane intersecting the nozzle outlet center axis, from the ring

chamber extend to the nozzle outlet. The cross section of the annular chamber, which remains around the peg-like projection and into which the supply channels of the outermost turbulence stage open, is preferably greater than the cross section of that annular chamber into which the feed channels of the next turbulence stage open, and the cross section of the latter annular chamber is then larger as that of an innermost ring-chamber into which the secondary passages enter, ''

In a particularly preferred embodiment of the spray nozzle according to the invention, the additional turbulence stage comprises

a) arranged to the annular chamber of the first turbulence stage at a greater distance from the mouth chamber Vorschal t-Ringkamnier that runs in the same to the nozzle center axis transverse zone as the first Ringkam- "mer or in a parallel to the latter zone, and

b) at least two of the Vorschalt annular chamber inwardly leading to the first Riragkaramer and in the latter at least approximately tangentially to the periphery opening feed channels, It can be arranged four feed channels symmetrical to Düsenauslaßmittelachse and four feed channels. The cross sections of all supply channels and secondary passages preferably decrease in the direction of the flow, at least in their discharge area. Above all, the cross section of the supply channels of each turbulence stage can continuously decrease from its inlet opening in the annular chamber of the same turbulence stage to its outlet opening located towards the nozzle outlet. The supply channels of the first turbulence stage may extend along conically tapered spirals,

The feed channels and, if present, the secondary passages preferably lead into the annular chamber located at their outlet openings tangentially to the periphery of the relevant annular chamber. In this case, the outer walls of the feed channels and the secondary passages tangential

to the peripheral walls of the respective annular chambers, in which they open, run. Presumably, the discharge cross-section of each supply channel and each secondary passage at its estuaries is at most one third of the cross-section of the annular chamber into which it flows ",

In the aforementioned particularly preferred embodiment of the spray nozzle, there are advantageously four to six feed passages, the same number of feed passages of the outer turbulence stage and the same number of secondary passages and the outer wall of the feed passages and secondary passages tangentially into the peripheral walls of those annular chambers into which they exit; while their inner walls along tangents to the outer walls of said annular chamber tangents to the respective edge of these inner walls with the outer walls of the latter 'annular chambers »Are three or more concentric annular chambers provided, the inlet opening of each supply channel is advantageously in the inner wall of the preceding annular chamber short before the confluence of the next supply channel of the preceding turbulence stage in the latter annular chamber, and the inlet opening of each secondary gear is located in the inner wall of the latter ring comb he shortly before the confluence of the upstream in the flow channel supply channel in the latter Ringkamraer, the cross-section of each secondary gear from its siphon opening to its orifice into the annular chamber preferably continuously decreases «

Particularly advantageous also has, if in each section der.Ringkaramer from immediately downstream of the confluence ein.von outside in an annular chamber opening supply channel until immediately upstream of the confluence des.in the flow direction next outward into the Ringkaramer inlet channel of the flow cross section the annular chamber decreases »

The inlet opening of the feed ducts of a subsequent turbulence stage in the inner side wall of the annular chamber located in front of this turbulence stage are advantageously offset from the direction of flow of the liquid flowing through the latter feed ducts into this annular chamber with respect to the outlet openings of the feed ducts of the preceding turbulence stage leading into this annular chamber. ,

Also, in particular in spray nozzles having the features described in the two preceding paragraphs, inlets may be provided for a second medium, each of which leads from the outer landing of the nozzle housing down to a Ririgkaiamer. Of the inlets for a second medium, each of the Outer landing of the nozzle housing forth into a Ringkatnmer lead, in which the inlet between the junctions of two adjacent, opens from the outside into the annular chamber supply channels opens «In particular, the inlet between the junctions of two adjacent from the outside in the annular chamber opening feed channels tangentially lead to the flow direction through the annular chamber in this.

In the embodiment of the spray nozzle described above, in which inlets are provided for a second medium, preferably in the sections, each ring cat dries from immediately downstream of the inflow of the outside inlet into the ring chamber upstream of the inlet for a second medium Up to 'immediately upstream of the junction of the next in the flow direction from the outside into the Ringkamraer inlet channel from the flow cross-section of the annular chamber, whereby when flowing through the liquid through the opening from the outside supply channels

and sucked through the annular chamber second medium.

In the above-described embodiment of the spray nozzle in which a peg-like protrusion protrudes from the bottom wall of the nozzle interior opposite to the nozzle outlet, the bead end of the protrusion may be formed as a strino surface and form the bottom surface of a conical space; Furthermore, the nozzle interior as the annular chamber of the first turbulence "stage and the mouth chamber comprehensive cavity can be formed in the sent from the nozzle outlet bottom side of the housing, and the front end of the projection can form a tapered towards the nozzle outlet truncated cone, with its jacket wall at a corresponding formed, the Sinlaßsei ~ te the nozzle outlet surrounding inner wall of the cavity tight

_{S (} which are then provided in the lateral surface of the e-stump or the contacting upper wall of the cavity, or in both grooves _s which form the said supply channels of the first turbulence stage * These grooves can end in the Kegelwandung at a distance from the nozzle outlet and at their Also, these grooves may constitute portions of a helix having a diameter decreasing toward the nozzle outlet. The deflecting sleeper constituting a break-up obstacle with the smooth region of the conical wall extending to the nozzle outlet.

Also, a propellant-free aerosol dispenser for dispensing liquid product having an inner bag of deformable, non-distensible material for receiving the product, an outer wrapping element of stretchable rubbery macromolecular material, disposed around the inner bag and forming an energy store, may be attached to the bag connected product outlet, a between bag and product outlet arranged, the output of product from the bag through the product outlet controlling valve inlet

direction, and a rigid, housed inside the bag whose cross-sectional area at least hO% greater than the taken in the same sectional plane inner cross-sectional area of the wrapping element in unstretched state, and wherein the maximum filling volume of the bag in the fully unfolded state without expansion of the bag warp Limiting expansion of the covering element to a maximum value which is within the range of linear stretching work of said rubbery macromolecular material, having in the product outlet of the bag a spray nozzle according to the invention incorporated in one of the above-described embodiments. Furthermore, a fire-fighting syringe with a main water supply line as the dispensing nozzle can have an injection nozzle according to the invention. Such a fire-fighting sprayer with main water supply line and dispensing nozzle can also be equipped with a container for fire-extinguishing medium with fire-extinguishing-agent suction line leading into the main water supply line just in front of the nozzle.

The spray nozzle according to the invention is also applicable to aerosol spray cans.

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Further details of the spray nozzle according to the invention are described in the following description of preferred embodiments thereof in conjunction with the drawings, in which

1 shows a partially cutaway perspective view of a first embodiment of a spray nozzle according to the invention consisting of an upper outer part and a lower inner part;

Fig. 1Λ is a perspective view of the inner part of the Ausführungsf orra shown in Figure 1;

Fig. 2 in front view an aerosol dispenser head, as it can be used for actuating an aerosol sprayer or the like atomizer, with built, shown in plan view inner part of the spray nozzle of Fig. 1A;

Fig. 3 in perspective, partially cutaway

View of a two-part atomizer head with a slightly modified embodiment of the spray nozzle; ,

4 shows a longitudinal section through an atomizing head with a further two-part embodiment of the spray nozzle according to the invention;

5 shows a cross section through the nozzle insert of the preceding embodiment, along a plane indicated by V-V in FIG. 4 (the sectional plane of FIG. 4 is indicated in FIG. 5 by IV-IV and on an enlarged scale;

6 shows a longitudinal section through the embodiment of the nozzle insert core shown in FIG. 5 along a plane indicated by IV-IV in FIG. 5; FIG.

FIG. 7 shows a longitudinal section through a nozzle sleeve of the spray nozzle which is suitable for the insert cores of FIGS. 5 and 6;

8 shows a longitudinal section through a partial region of the nozzle composed of the parts according to FIGS. 6 and 7, in longitudinal section and on an enlarged scale;

9 shows a cross section through an embodiment similar to that shown in FIGS. 5 to 8, but with six supply channels;

10 shows in cross section a further embodiment of the nozzle insert core with three turbulence stages;

11 shows a longitudinal section through the nozzle insert pot according to FIG. 10;

Fig. 12 is a cross-sectional view through a nozzle core similar to that shown in Fig. 5 but with additional passages for introducing a second medium;

Fig. 13 is a longitudinal section through an embodiment of the Spritzdüese with a nozzle core of Figure 12 _f and having an inlet valve and inlet ducts for the second medium "

14 is a view, partially in section, of an embodiment of the spray nozzle with ejection channel, annular suction channel and control valve according to FIG. 13;

Fig. 15 is a view similar to that of Fig. 14, but with simple suction ports for a second medium;

Fig. 17 is a view, partly in longitudinal section, of a propellant-free atomizing device using the spray nozzle;

Fig. 18 is a fragmentary longitudinal sectional view of a portion of the device of Fig. 17;

19 shows a longitudinal section through a "fire-fighting syringe with spray nozzle used in it according to the invention;

FIG. 20 shows an application of the spray nozzle according to the invention in a two-camera aerosol can «

The Ausfüh'rungsform shown in Figures 1 and ΊΑ the nozzle comprises a nozzle body 1 consisting of the upper sleeve part, or, the nozzle outer half 2, which in the upper outer end surface 2a in the middle of the outer opening of a nozzle outlet 3; 3a.aufweist, as well as from the lower or inner half 4 of the Düsenlcörpers 1, which on the nozzle outlet 3 facing end face 5a of its "base part 5 carries a nozzle core 6.

The sleeve part 2 has on its the inner half 4 facing lower end surface 2b a cylindrical cavity? which continues upward into a frusto-conical recess 8, at the apex of which the nozzle outlet 3 opens to the outside.

The nozzle core 6 has a cylindrical foot part 9 of smaller diameter than the inner diameter of the cavity 7, and above a conically tapered edge surface 10, which sealingly engages the assembly 8 of the two nozzle pieces 2 and 4 on the conical end wall of Ausneh- '

In the base part 5 of the inner body 4, two for extending through the nozzle outlet 3 nozzle central axis MA parallel to her symmetrically arranged extending in the axial direction feed channels 11, which Zuführhrkanäle 12, provided by which to be sprayed, pressurized liquid in the between the end face 5a, .the foot part 9 and the 'upper end wall and each one up to an axial edge 19 inwardly projecting nose portion of the outer Urafangswandung the cavity 7 remaining Ringkamraer 13 a first turbulence stage of the nozzle is fed.

In the cylindrical foot part 9, two grooves 14 extending axially to the nozzle central axis MA are provided as sections of secondary supply channels, the latter being in the conical edge surface 10 in each case

as in the flow direction constricting helical line sections formed grooves or passages 15 continue, which extend to the turbulence or swirl chamber 16, which is bounded by the upper end face 10a of the nozzle core 6 and the inner wall of the frusto-conical recess 8. "The cross-sectional area of the gears 15 decreases according to their outlet openings _s i. gradually diverge from their junctions into the vortex chamber 16

Feeding channels 11, ring chamber 13 »feed channels 12, aisles 14-, 15 and vortex chamber .16 and the downstream in the direction of flow Mündungskamraer 17, which is upstream of the nozzle outlet 3 in the flow direction, form the hollow nozzle interior of the embodiment of Figures 1 to 3.

At the point of attachment between each passage section i4 and the passage 15 adjacent thereto, there is an obstacle 18 for creating or increasing a mechanical break-up of the liquid product _e flowing through. In the embodiment according to FIGS. 1 and 1A, this obstacle comprises one Stage i8a, at which a change in direction of the liquid flow occurs _f wherein both the area of the side wall of the following passage 15, which is closest to the end surface 2a, and the liquid flowing into the passage section 14, act as deflecting or rebounding surfaces.

The two nozzle halves 2 and 4 can be produced in a simple manner by known injection molding and can be thermally welded or glued together, of course, it can also be provided Zargenverbindungen on the connecting periphery of the two halves ₀

In the atomizer head 20 shown in FIG. 2, the nozzle body 1 is inserted in the lateral head wall 21 in a conventional manner. He

can of course also be used in the Zerstäuberkopfstirnfläche 20a. ,

Since in Pig. 2, the nozzle outer half is removed, only the corresponding inner half 4 of the nozzle body shown in Fig. 1A is visible in plan view. ''

In Pig, 2, the arrangement of two primary supply channels 12, which open tangentially in the flow direction in the annular chamber 13, wherein the inside of its wall with the outer Viand of the annular chamber 13, the wall edge 19, pulled out, while two further supply channels 12 ', the are connected to two other feed channels 11 ¹ , dashed lines are shown _e from the Ringkaramer 13 then lead axial passage sections 14 and the gears 15 to over the end face 10a of the nozzle core 6 located v / irbelkamraer and continue to DUsenauslaß 3 »

Another embodiment of the spray nozzle is shown in FIG. In her, the passage sections 14 and 15 gears are omitted and replaced by provided in the conical inner wall of the recess 8, guided in the nozzle center axis radially extending plane or preferably corresponding to a helix with the nozzle outlet 3 toward decreasing diameter extending feed channels forming grooves 24 and 25 replaced , The upper end walls 24a and 25a, which are inclined rather steeply into the flow of the liquid, present obstacles in the flow path. promote "mechanical break-up" of the liquid »

The frusto-conical recess 8 thus jointly closes a turbulence chamber ΐβ reaching approximately to the region of the upper ends of the grooves 24 and 25, and an outlet chamber 17 above the latter.

The sprayer actuation head 30 shown in longitudinal section in FIG. 4

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Contains in its side wall 3 ° a recess 31 "in which the nozzle shown in another embodiment, from a nozzle sleeve 33 and inserted into the provided in the inner wall of the latter recess 33a nozzle core 32 existing spray nozzle is inserted." The nozzle core 32 carries in his ara bottom 33b of the recess 33a close-fitting front, the nozzle outlet 4-1 facing end surface 32a and in its on the side wall 33c <* er recess 33a close-fitting lateral peripheral wall 32b formed depressions, created in the assembly of nozzle core 32 and nozzle sleeve 33rd Nozzle forming the hollow nozzle compartments consisting of chambers and channels.

The recesses mentioned are particularly illustrated in the illustrations of the nozzle core 32 according to FIGS. 5 and 6.

The actuating head 30 carries on its underside a below 'open sleeve piece or neck part 34' in which the valve stem of an aerosol-Sprüd Öse can be plugged in a known manner. The interior of the piece 3 ^ forms the main feed channel 27, from the upper end region in the actuating head 30 four feed channels 35 in the axial direction to the nozzle central axis IiA, which are formed by longitudinal grooves in the Urafangswand 32b of the nozzle core 32, to depressions in the end face 32a As can be seen in FIG. 5, this comprises four feed ducts 36 which are each connected with their inlet opening 36a to the front end of one of the axial feed ducts 35 and which are each skewed to the central axis of the nozzle in a plane which intersects this axis at right angles run tangentially into a geraeinsame first annular chamber 37th, with their junctions 36b are distributed symmetrically about the outer wall of the wall 37a of the annular chamber 37 (Fig. 5a) and form the leading edge 3Sc with the latter peripheral wall.

From the Ringkaramer 3? out of four passages 38 of the next succeeding turbulence stage enter into a second, inner ring-karter 39 "which is a peg-like one from which through the bottom surface JSa. the supply channels 36 certain level until the entrance to the nozzle outlet 4-1 protruding projection 4-0 surrounds «· ·

As can be seen, the ingkammern and channels through the Bodenfläehe 33b of the recess 33a hermetically or at least liquid-. tightly covered "A liquid which flows through the hollow nozzle interior and thus can only move through the channels and annular chambers onto the nozzle outlet 41.

The most ideal conicity of the feed channels 36 is achieved by drawing a tangent to the periphery of the annular chamber 37 from the channel side 35 A and a straight line through the intersection 37A of this tangent to the annular chamber 37 from the channel side 35B. Advantageously, the width of the Ringkamraer 37 is then selected so that it is equal to the width of the junction 36k ^ channels in the Ringkararaer 37. By this configuration it is achieved that a pressurized liquid coming from the channels 35 is accelerated by the constriction of the channels 36 until they enter the ring chambers 37 and thereafter the ring chamber 37 gives the fluid a centrifugal force component by the rotational movement imposed on it. Furthermore, in the annular chamber 37 before a respective junction 36b a channel 36 is a suction. The most ideal location for the edge 38d of the entrance opening 38a of the secondary passages 38 is obtained when a tangent to the periphery of the second ring chambers 39 is drawn from the first point of contact on the edge 36c between the line 35B-37A and the ring chamber wall 37a, and the most ideal entry width The inlet openings 38a of the passageways 38 are achieved by drawing at the point of contact 39A of this tangent with the second annular chamber 39 a straight line to the point 35A of the channel side edge 35a of the feed channel 35. Advantageously then becomes

Width is selected for the annular chamber 39, which is identical to the sur- face of the widths of the junctions of the passageways 38 in it, thereby determining the diameter of the peg-like projection A0 The channels 36 are unchanged in height, whereas the channels 38 are off Entrance point 38 a between the two axial wall edges 38c and 38d not only laterally, but also with respect to their height to the junction 38b in the R ing chamber 39 constrict .. This constriction is not continuous, but by a step 23 interrupted, the mechanical Break-up generating obstacle already generates turbulence during the accelerating process (FIGS. 5 and 6) .The peripheral edge of the front side 40a of the projection 4-0 also leads to turbulence in the liquid flowing through the passages 38. Additional turbulence is caused by an on the inside of the Nozzle sleeve 33 around the nozzle outlet 41 around annular bead .42 · caused (Fig. 7) _e

In the spray nozzle according to the invention, a liquid under pressure is deliberately accelerated and rotated in rotation, resulting in optimal utilization of the existing ejection force. The volume of the main channel 2? is significantly larger compared to the mentioned channels and passages connected to it. This oversized volume of the main feed channel 27 compared with the channels and passages is on the one hand necessary to bring the existing pressure under which the liquid is unrestricted up to the channels 35 to effect, and on the other hand, so that the channels and passages even with slightly dry liquid through a slower evaporation of a relatively large amount of liquid, which is stored in the main dish channel 27, remain consistent «

By correspondingly changing the cross section of the channels 35, but also the cross sections of the spaces 36, 37, 38 and 39 of the hollow nozzle interior, it is possible to adapt the spraying power of the spray nozzle according to the invention to the respective viscosity of the liquid. A higher viscosity of

Of course, liquid requires a larger cross section than a small one,

The droplet size is adjustable by changing the distance between the peg-like projection 40 and the annular rib 42 of the nozzle sleeve 33; the smaller the distance, the smaller the drop size. Of course, the distance should not be kept too low, which reduces both-the ejection speed, as well as the emission angle of the spray cloud increases ,, unless _t these properties are desirable for one or the other product. The ejection angle of the spray cloud also depends on the length of the nozzle outlet Al of the nozzle sleeve 33. The longer the outlet 41, the smaller is this angle »

Dole Figures 7 and 8. Show a further advantageous embodiment of the spray nozzle according to the invention. The outer core 32 is similar to that shown in Figures 4 to 6, except that instead of the second annular chamber 39 it has a turbulence chamber 45 which is formed around its -Stirnseite 40a around the projection 40 carries an axially projecting annular flange 44. The recess formed on the end face 40a within the latter defines the turbulence chamber 45 inwardly, while the bottom surface 33 'of the recess 33a of the nozzle sleeve 33 defines this chamber to the outside, the annular bead 42 whose outside diameter is somewhat smaller than that Inner diameter of the annular flange 44, slightly protrudes into the turbulence chamber 45. It remains between the annular flange 44 and the annular bead 42, an annular gap 46 which, especially if the upper edge of the annular bead 42 extends to the plane of the upper edge of the annular flange 44 or beyond this level into the interior of the turbulence chamber 45, a considerable Increasing the turbulence in the latter chamber causes. (Fig. 8)

In the embodiment according to FIG. 7, the nozzle sleeve 33 is provided at its inner edge surrounding the recess 33a with a ring flange or a ring flange.

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provided flare 28 which so firmly engages in a corresponding recess recess 28a of the actuating head 30 that they can not be solved by a standing under strong pressure liquid from the operating head 3 °.

Fig. 9 shows another embodiment of the nozzle core 32 with six feed channels 35 leading to six feed channels 36 and which open into a common Ringkamraer 37, from which six secondary passages 38 to the common 'second annular chamber 39 lead »through the peg-like Boundary 40 is limited »

FIG _e 10 shows a further embodiment, more consecutive turbulence stage can be provided in v / hich die'erfindungsgemäße spray tip not only two but also three or, ie in addition to the channels, passages and annular chambers 36, 37 »38 and 39 For example, the nozzle core 2 may still contain the tertiary passages 48 and the annular chamber 49 and may be provided above the projection 40 with a turbulence chamber 4-5. Of course, the number of successive levels of turbulence also depends on the available pressure of the liquid, so that it does not come too much friction for excessive braking of the liquid flow. The greater the pressure under which the liquid is located, the more turbulence stages can be provided. In this embodiment of Fig. 10, the height of the feed carts and gears does not taper, but gradually decreases toward the turbulence chamber 45; each step forms an eddy leading obstacle and the constriction of the passages achieved is an acceleration factor for the fluid flow (Figure 11). , ,

FIG. 12 shows yet another embodiment of the nozzle core 32, in which the latter additional inlet to the channels 36 and 38 still inlet

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channels 29, whose inlet openings 29a are not displaced at the periphery of the nozzle core 32 but towards the center thereof and are fed via the end face 33c of the nozzle sleeve 33 through the same axially extending passages 26. The inlet channels 29 are arranged that they open tangentially to the outer side wall of the annular chamber 37 in these suction-generating points, between the junctions 36 b of each two adjacent supply channels 36.

In order to create an additional suction effect in the inlet channels 29, the outer wall of the annular chamber 3 is? not absolutely round, but narrows each straight (seen in the direction of flow) in front of the junctions 29b of the inlet channels 29. The already accelerated liquid flowing from a feed channel 36 is driven into the consequent narrowing of the annular chamber 37, where it is once again accelerated, thereby as it flows past the confluence 29b of a corridor 29, this more so as this junction 29b lies slightly behind (ie, upstream of) the inlet 38a of a passage 38 through which the liquid flows to the nozzle outlet 41 » are intended to suck in a second medium, such as, for example, air, and to mix it with the liquid flowing through the nozzle interior «

Since the erfindungsgeraße spray nozzle is preferably to dispense a, of gas, and in particular of blowing agent gas-free product, so when a foam-forming product, for example, shaving cream as a foam spent <

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verden, and this requires the presence of gaseous medium to foam, in addition to the base liquid of Rasierkreme still a Gasantoil be introduced. This can be done by the base liquid flowing through the supply channels 36 »the Ringkamraer 3? and the passage 38 through the openings 29 a inlet ducts 29 can suck air, which then, mixed with the liquid forms the shaving foam (Figures 12 to 15).

Since in a gas-free alternative for aerosol cans described below in addition to foam-forming emulsions also OeI can be filled, but also require a gas medium to be sucked as a dust or spray cloud from a spray nozzle of this Gasmediuras (air) via the inlet channels 29. The cross section of the inlet channels 29 depends on the desired amount of air, which one needs for mixing and must therefore by case. J5U case adapted. FIGS. 14 and 15 show a spray nozzle with a nozzle sleeve 33 and with a nozzle core 32 inserted therein, in which the four openings. 29 a, through which a second medium can be sucked through the Sinlaßkanäle 29, via passages 26 a and an annular channel 26 b (dashed lines in Fig, 14 shown) are interconnected, which extends in the nozzle sleeve 33 and connected to an inlet valve 22 is with which the intake of the second medium can be controlled. Such a design can suck in addition to a gas medium and other fluid media, such as liquids or fine powders.

The following figures illustrate different application possibilities of the new spray nozzle in devices of known and new type. FIGS. 17 to 19 show a new propellant-free spray or spray device.

This device is a propellant gas-free alternative to the known aerosol suds. The sprayer shown in Fig. 17 carries a spray nozzle according to the invention and is filled with a liquid to be dispensed. The valve unit required in this device comprises an outer hollow core 128 which is aufmontiert on the piston seat 129, the piston 131, the sealing ring 132 made of elastic material and the inner hollow core 130 which is mounted in the outer hollow core 128, thereby serving the. Intermediate space 133 between outer hollow core 128 and inner hollow core 13O as liquid line to piston 131 The outer hollow core 128 is provided with the opening 134 at its rounded end and has a plurality of ribs 135 around the opening 134. The piston surface 129 is at that End, which carries the outer hollow core 128, provided with the bore 137 and has around the opening 137 also has several ribs

136 * Di® The length of the hollow core 13O is held so that its ends rest firmly on the support ribs .135 and 136, respectively. At the piston seat 129, the container 138, which contains the liquid 139, is actuated, so that outer and inner hollow core 128 and 130 are located in the longitudinal axis of the container 138. This is surrounded by a Gummischiauch 140, which serves as an energy store.

The arrangement of an inner hollow core 13O in the outer hollow core is advantageous in that it requires the least assembly work and also offers the possibility of changing the cross-section of the liquid line 133 at no great cost, if

if 'a specific product should make this necessary'

 p

the passages 141 of the piston 131 are compared to the former valve piston, much greater to the liquid 139 unrestrained on the main channel 104 of the actuator head 101 in the described channels ¹ , annular chambers and passages of the nozzle core 102 with full overpressure under which they Rubber tube 14O is set to take effect. According to the invention, therefore, the liquid 139 flows through the opening 134 and between the ribs 135 to the intermediate space 133 and from there between the ribs 136 through the opening 13. until the sealing ring 132. When the operating knob 101 is pressed downwards, the passages 141 of the piston 131 are exposed so that the pressurized fluid 139 can feed the main channel 104 and the described channels, chambers and passages of the nozzle body 102, thus finally causing the liquid

139 as a fine spray cloud via the nozzle outlet 111 from the invention

    ?

proper spray nozzle, as long as the actuation f

head 101 is printed downward, what is the spray of a propellant using aerosol spray _s but here without gas, in the function |

equal. "

Fig. 1.8 shows that with the valve device according to Fig. 1? Yet another object can be achieved. "There are many aerosol cans of bottled liquids that settle sediment after a short period of storage and therefore need to be shaken before use to mix the sedated material with the liquid phase of the product. For this one uses small in the aerosol spray cans. ί Steel balls that ensure the mixing process when shaken. Experiments of this type have also been made with the present gas-free alternative, but have shown that, depending on the severity of the shaking, especially if some of the liquid is already exhausted

The rubber tube 140, starting at the piston seat, firmly presses around the hollow core 128 while firmly pressing the container .138, whereby the steel balls between hollow core 128 and container 138 t

or, rubber hose 14O be pinched and remain there, so I

are no longer available for mixing »

In Fig. 18 at the bottom of the container 138, a sediment 142 is indicated, which has settled out of the liquid 139. While the outer hollow core is identical to that of FIG. 17, here the internal hollow core 13 is replaced by a filled, shorter inner core 143. The weight of the inner core 143 must be adapted to the density of the liquid f he neither of the liquid nor of the pressure, | under which she stands, can be printed towards the ribs 135, | but, in an attitude of the device as shown in Fig. 18, j always rests on the ribs 135. Furthermore, it must be shorter than the f inside length of the outer hollow core 128, shaking now the device!

in the axial direction, the inner core 143 moves coaxially in the outer hollow core 128, sucks sediment particles 142 and liquid 139 via the opening 134 when rising in the direction of the ribs 136 and ejects both when falling in the direction of the ribs 135 again. This creates eddies in the sediment 142, which are transferred to the liquid 139, whereby an intimate mixture of the two phases is accomplished. The remaining parts function as described in Fig. 17 ^.

FIG. 19 illustrates the use of a spray nozzle according to the invention in a fire-fighting syringe. Although it is possible, thanks to the extraordinary mechanical break-up achieved with the spray nozzle according to the invention, (in particular when such a device is shown in FIG. If you also add air to the water, as described in Figures 13 to 15, you have the option of adding an extinguishing agent in addition to this very effective fire-fighting measure. " On a fire-fighting sprayer 90, a spray nozzle according to the invention is screwed on, wherein the nozzle core 8? the passages and annular chambers as shown in Fig ', 11 has shown and is additionally provided with the inlet channels 49a of FIG. 13, which 88 suck air through the channels 89 of the nozzle sleeve. The syringe body 90 is provided with a Aufschraubstutzen 91, which has the bore 92, which is directed so that it opens into the syringe body just behind the constriction 93, wherein one in syring ». body 90 in the direction of the spray nozzle according to the invention a suction on the bore 92 exerts a suction (Venturi system) «The connection piece 91 carries the container 94 and attached to it riser 95» wherein the sealing ring 96, the syringe body 90 and the container 94th sealingly connects with each other. In the container 94 is a fire extinguishing agent 97 »e.g. Chlorobromoethane, stored. If water in the fuel body 90 flows under pressure (for example 6 to 10 atmospheres), then

this sucks the fire extinguishing agent 97 'and mixes it with the water, as soon as this mixture comes into contact with the fire. Because of its high heat of vaporization, the water cools the burning material off, and as it is ejected from the fire-vane spray as a fine mist thanks to the spray nozzle according to the invention, its large surface prevents further oxygen access to the burning material, while , Bromochloromethane 97 via the water vapor acting as a catalyst eino accumulation of the remaining oxygen to the CO molecules allows (Chemie Lexikon Rörapp),

Instead of the aforementioned device can suck the fire extinguishing agent via the control valve 22 and the annular channel 26 of the spray nozzle of Figures 14 and 15 and mix with the extinguishing water, which has the advantage that a very large container for the fire extinguishing agent 97 can be used the only flexible supply line to the inlet pipe of the control valve 22 required »

- 33-

Thanks to the spray nozzle according to the invention, as described above, it is possible to ensure a satisfactory particle size and constant discharge rate with a purely mechanical, low expelling pressure. However, in order to avoid that the volume change in the product boilers causes a pressure change, reducing valves and similar means must be provided to keep the pressure constant. The spray nozzle according to the invention can thus be used in exactly the same way as is the case with known nozzles in the conventional aerosol spray cans. Most consumers of aerosol cans and other atomizing devices refrain, after use, from re-injecting an existing protective cap over the spray nozzle to put. It comes on the one hand easily to dusting of the nozzle and on the other hand, the spray nozzle, especially in hair lacquers and color lakes, clogged by the carrier solvent evaporates and leaves inside the channels and passages of the spray nozzle from use, thicker to use paint layer.

To avoid this deficiency, the spray nozzle according to the invention with a cap 433 -Fig. 20- are provided, which remains firmly connected by means of a snap closure 441 with the spray nozzle 402 and in the side wall of an opening 434 is provided. The cap 433 covers with its side wall the spray nozzle 402. A spring 436, which in the Innenraura 43? has a much smaller force than the spring 438, which the valve body 439 of the discharge valve 440, but .large enough to the cap 433 in the rest position on the

Actuator 402 to hold in maximum raised position, whereby the opening 434 is above the nozzle outlet 402a to lie, so that the Dusenauslaß 402a is covered by the side wall of the cap 433 tight. This avoids both dusting of the spray nozzle 402 and evaporation of the solvent of the product remaining in it after a spraying operation,

The actuating head 402 and the cap 433 are either provided with guide rails for orientation of their position to each other or are of non-circular outer or inner cross-section. Preferably, these cross sections are * oval or elliptical, for example, so that the opening 434 always lies vertically above the nozzle outlet 402a.

If you push v.on the top of the cap 433, this moves first down until the spring 436 is compressed; As a result, the opening 434 in the cap side wall is aligned with the nozzle outlet 402a. Upon further downward push, the stronger spring 438 of the discharge valve 440 is also compressed and the valve 440 opens. As soon as the pressure on the cap 433 ceases, the stronger spring first closes the valve 440 and only then does the weaker spring 436 lift the cap 4-33 into the closed position, in which the nozzle outlet 402a is again sealed by the cap sidewall below the opening 434 , As a seal, a thin elastic covering may be attached to the inside of the cap *

The new nozzle eliminates the need for a pump which requires only repeated expulsion of the product, but also pumps ambient air and thus oxygen into the product container, which of course results in undesirable oxidation of the product. "

The container in which the product to be atomized by means of the spray nozzle according to the invention is stored, can readily against air,

Spores, bacteria and other factors that can destroy the product, be dense, and also avoid that contained in the product volatiles volatilize during storage.

In the embodiment according to FIGS. 17, 18 and 20, the energy storing element for the expulsion of the product stored in the container is suitable for expelling the entire product uniformly and in linear consumption from the container. It is designed in such a way that the product can be stored for several months without losing a significant part of the energy of the shoot. The residual energy of the element is sufficient to drive the product completely out of the container and to produce a spray cloud whose particles are so fine that a product mist can be reached even under unfavorable conditions, such as, for example, a small squeezing pressure.

To best illuminate the extraordinary possibilities of the spray nozzle according to the invention, it should be mentioned that laboratory tests have shown that thanks to this nozzle in aerosol cans up to 75 % propellant, can be saved. In summary, it should be said

a) The spray nozzle according to the invention is able to spray a standing only under mechanical pressure fluid with only about 2 atm in the same quality as commercial spray nozzles achieve this only with a pressure of 6 atm.

b) This means for Aerosolsprüdosen that propellant gas no longer both as ejection energy and by relaxation an'der ambient air, must serve as Versprühungsfaktor, but only the pressure to deliver, which is just enough to the mechanical break-up properties of the invention Make full use of the spray nozzle «

c) this in turn means that it is no longer a propellant gas,

as Freon 11 and Freon 12 must be used, which was previously necessary, on the one hand to produce a sufficiently large amount of gas, which serves as spraying factor, and. On the other hand, by a different large amount of one or the other gas mixture Koraponente, thanks to their very different boiling point, the ejection pressure to vary, but it can be used with the injection of the spray nozzle according to the invention only the propellant gas with the lowest boiling point and only so much of it are used that ca * 2 Atü overpressure in the aerosol can be achieved,

d) Experience has shown that such "B _e for hair lacquer instead of 77% gas mixture of Freon 11 and 12 corresponding to 3» 8 atmospheres pressure at the use. spray nozzle according to the invention only 19 % freon 12 corresponding to 1.7 atm pressure must be filled in the aerosol can to achieve identical spray qualities. The erfindungsgeraße spray nozzle also works with 1 * 7 atü pressure or even, depending on the required drop size, down to 0.8 atü, preferably that this pressure is generated by, a propellant gas "After the propellant gas has played its role as Ausstzenergiequolle, it relaxes , albeit to a lesser ^ aces in contact mi _(t of ambient air and compensated as spraying factor, the further to the above 2 atm missing pressure components

Laboratory tests have also shown that, thanks to the mechanical break-up properties of the nozzle according to the invention, liquids that are forced through them at high pressure can be vaporized because of the heat of purification produced. "

Conversely, it has been found that liquid mixture having a boiling point below 40 C can freeze through the vortex formation in the interior of the spray nozzle according to the invention and because of the resulting evaporative coldness, the aforementioned passages, annular chambers and channels.

It is therefore only possible to spray liquids whose boiling point is above the stated limit.

Claims (4)

Claim of claim_; , 1 * Spray nozzle for dispensing a pressurized liquid in the form of a spray cloud, comprising (A) a housing with a central nozzle outlet and (B) a liquid jet nozzle surrounded by a side wall for flowing liquid through the nozzle outlet (a) an outlet chamber disposed in front of the nozzle outlet and coaxial with it along a median plane transverse to the nozzle center axis, (B) a coaxial to the mouth chamber Ringkainmer, (C) at least two the annular chamber with the mouth chamber-connecting, at least approximately tangentially to the periphery of the mouth chamber to this leading, each in a nozzle central axis intersecting plane extending feed channels or passages, wherein the supply channels and the annular canals form a first turbulence stage, and (D) at least one feed line, for the supply of liquid in the first turbulence stage, characterized as in that the hollow nozzle interior comprises at least one additional turbulence stage, and at least one obstacle serving for the break-up of the liquid flowing from the preceding to the subsequent turbulence stage is provided between a downstream turbulence stage in the side wall of the hollow nozzle interior, which deflects the flowing liquid out of the annular chamber perpendicular to the nozzle central axis extending Strömuhgsebene out to the side of the nozzle outlet at an angle of up to 90 «. 2. Spray nozzle according to item 1, characterized in that the break-up ~ obstacle at least one of the flow ~ direction opposite deflecting or impact surface urafaßt. 3, spray nozzle according to point 2 geke η η ζ calibration η et in that the additional turbulence stage between the feed line and the inlet of the first turbulence stage is interposed, that the feed line comprises at least two substantially extending in the axial direction to the nozzle axis axial feed channels and that the additional turbulence stage 'comprises at least two supply channels approaching in the direction of flow of the nozzle center axis, each of which is connected with its inlet opening to one of the feed channels and opens with its outlet opening in the aforementioned annular chamber » 4, spray nozzle according to item 1, characterized d a - you r. c ¹ h, that the obstacle comprises a deflecting edge projecting into the liquid flowing through the supply channels, in the outer or inner wall region of the side wall of the nozzle interior which covers the turbulence carara on the side surrounding the nozzle outlet, 5, spray nozzle according to point 3 * marked that the impact surface is formed on a shoulder in the side wall of the nozzle interior, the shoulder being mounted in that portion of the side wall of the nozzle interior which is on the opposite side of the nozzle with respect to the nozzle outlet. 6, spray nozzle according to point 5 {'marked da- d u r ch that the Durchströtaungsquerschnitt the feed channel before the. Paragraph is greater than that of the same supply channel as described in paragraph 7, spray nozzle according to point 3, g e k e η η ζ e i c h η e t in that the impact surface at the junction of a feed channel the preceding is provided in the Ringkararaer of her directly subsequent turbulence stage, The spray nozzle according to item 1, characterized in that from the bottom wall of the nozzle interior opposite the nozzle outlet, a peg-like projection protrudes at least close to the inlet side of the nozzle outlet, at least one passage gap from the mouth chamber between the front end of this projection and the inlet edge of the nozzle outlet to the nozzle outlet remains free »' 9 * Spray nozzle marked after point B _t By J _f h that the Pußzone of the projection is coaxial with the cylindrical Düsenraittelachse and from which the Sinlaßseite of the nozzle outlet containing. interior side wall of the nozzle at most 0 _e is the distance of its end face designed as a "front end !! 1 mm" 10 * spray nozzle according to item 8 _S, characterized in that the projection is tapered towards the nozzle outlet and the distance of its front end from the inlet edge of the nozzle outlet is at most 0.05 mm. 11 »spray nozzle according to item 8, characterized in that the projection, whose foot zone is surrounded by the Ringkaranier the first turbulence stage rests _s with its front end at the inlet of the nozzle outlet, and that between the end face of the projection and the voltage applied to it, the Sinlaßseite of At least two secondary passages for liquid, each extending in a plane intersecting the nozzle outlet axis, extend from the annular chamber to the nozzle outlet. 12 »spray nozzle according to item 1 * 1, characterized in that the cross section of an outer Riagkammer, in which the feed channels of the outermost turbulence stage open, is greater than the cross section of the one. Ringkaramer, in which the feed channels of the subsequent turbulence stage open, and the cross section of the latter annular chamber is greater than that of an inner 'most Singkammer', in which the secondary passages'einmünden. 13 "spray nozzle according to point 3", characterized in that the additional turbulence stage arranged to Ringkaramer the first turbulence stage at a greater distance from the Hündungskammer Vorschalt-Ringkaramer in the same transverse to the nozzle center axis zone as the first annular chamber or in a parallel to the latter Lelen zone runs, and at least two of the Vorschalt-Ringkararcier inwardly leading to the first annular chamber and .in the latter at least approximately tangentially to-the periphery of which opens feed channels comprises 14, spray nozzle according to point 3t, characterized in that four feed channels arranged symmetrically to the Düsenauslaßmittelachse and four .Fehrtkanäle are provided, 15 »spray nozzle according to point 3» marked d a - that the cross-sections of all supply channels and secondary passages in the direction of flow decrease, at least in their Ausraündungsbereich » 16 »Spray nozzle according to item 15», characterized in that the cross section of the supply channels of each turbulence stage continuously decreases from its inlet opening in the annular chamber of the same turbulence stage to its outlet opening towards the nozzle outlet «. Spray nozzle according to item 15, characterized in that the supply channels of the first turbulence stage extend along conically tapering spirals, 18. Spray nozzle according to point 3 _S, characterized in that the supply channels and, if present, the secondary passages in. Open out at their outlet openings annular chambers tangentially to the periphery of the respective annular chamber. 19c spray tip according to point 17 »marked d a - This means that the outer walls of the feed channels and the secondary passages run tangentially to the peripheral walls of the relevant annular chamber into which they exit 2O "spray nozzle according to item 18, characterized in that the Ausmündungsquerschnitt each feed channel and each secondary gear at its point of injection is at most one third of the cross section of those Ringkaramer, in which he ended 2i _e spray nozzle according to item 3 _}, characterized in that four to six feed channels, the same number of supply channels of the outer turbulence stage and the same number of secondary passages are provided that the outer walls of the feed channels and secondary passages tangentially into the peripheral walls of those annular chambers, in the they merge, pass, while their inner walls parallel to the tangents defined by the outer walls to the confluence in the inner wall of the following in the flow direction annular chambers and Zuführkanä-Ie, that the inlet opening of each feed channel in the inner wall of the associated annular chamber just before its confluence in is the next feed channel, and that the inlet opening of each secondary gear is in the inner wall of the associated supply channel shortly before its Eoinraündung in the following flow direction in the feed channel, and that the cross section of each secondary 33- from its entrance opening to its exit opening into the inner annular chamber. 22, spray nozzle according to item 21, characterized by the fact that six feed channels and secondary gears are provided. '·' Spray nozzle according to one of the items 2 to 22, characterized in that the flow-through cross-section of the annular chamber opens from immediately downstream of the mouth of a feed channel opening into an annular chamber until immediately upstream of the mouth of the feed channel which enters the ring karter in the direction of flow decreases. 24 "_ Spray nozzle after one of the points. 2 to 22, characterized in that the inlet opening of the feed ducts of a subsequent turbulence stage in the inner side wall of the annular chamber located upstream of this turbulence stage is opposite the exit openings of the feed ducts of the preceding turbulence stage opening into this ring karter somewhat counter to the flow direction of the latter Supply channels are offset in this ring cam flowing liquid. 25. Spray nozzle according to one of the items 2 to 22, g β k e η η - characterized by the fact that inlets are provided for a zvjeites medium, each of which leads from the outer wall of the nozzle housing forth into an annular chamber. 26 «Spray nozzle according to one of the items 2 to 22, g e, k e η η - characterized by the fact that inlets are provided for a second medium, each of which leads from the outer wall of the nozzle housing ago in an annular chamber, in many the inlet between the confluence of two adjacent, opens from the outside into the Ringkamer opening feed channels. 27 «spray nozzle according to one of the items 2 to 22, characterized in that inlets are provided for a second medium, each of which leads from the outer wall of the nozzle housing forth in an annular chamber_, in which the inlet between the junctions of two adjacent, from outside in the annular chamber opening feed channels tangent to the flow direction through the annular chamber opens into this ,, 28 «Spray nozzle after one of the points 2 to 22 _s ets η - characterized in that inlets are provided for a second medium, each of which leads from the outer wall of the nozzle housing 3S into an annular chamber, each inlet opening between the junctions of two adjacent, externally opening into the annular chimneys Zi'.fuhrkanälen shortly upstream of the nearest junction of a supply channel and this preceding inlet opening of the Ringkaramer inwardly towards the nozzle outlet leading supply channel of the next turbulence stage opens, and that of immediately downstream of the Einraüradung of the outside into the Ringkaramer upstream of the inlet opening Feed channel until immediately upstream of the junction of the next in the flow direction following from the outside into the annular chamber inlet channel of the flow cross-section of the annular chamber decreases, thereby flowing through the liquid through the opening from the outside supply channels and through the Ring chamber second medium is sucked in, .29, "spray nozzle according to item 8, ge characterized in that from the nozzle outlet opposite bottom wall of the nozzle interior a peg-like · projection at least up to close to the inlet side of the nozzle outlet hinanragt, wherein between the front end of this projection and the inlet edge of the nozzle outlet at least one passage gap from the mouth chamber to the nozzle outlet remains free, and that the front end of the projection is formed as an end face and forms the bottom surface of a conical space. 30, spray nozzle according to item 29, ge k e η η ζ e i c h η e t d.a - For example, the nozzle interior includes as the annular chamber of the first turbulence stage and the mouth chamber. Hollow is formed in the side facing away from the nozzle outlet bottom side of the housing and the front end of the projection forms a tapered towards the nozzle outlet truncated cone, which rests with its jacket wall on a correspondingly formed, the inlet side of the nozzle outlet surrounding inner wall of the cavity, and in that The lateral surface of the truncated cone or the contacting-upper wall of the Aushöh- 'ment, or are provided in both grooves, which form said supply channels of the first turbulence stage. 31 »Spray nozzle according to item JO, marked - That is, the grooves in the keyway end at the distance from the nozzle outlet and form at their end a deflection threshold representing a break-up obstacle with the smooth region of the taper extending to the nozzle outlet. 32 "Spray nozzle according to Item 33" is characterized by the fact that the grooves represent sections of a helix with a diameter decreasing towards the nozzle outlet. HfPfTfI A ,
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